tree: https://github.com/weiny2/linux-kernel.git lm-kmap3 head: 6655fb2b681baf75040651697f2cd363cca7a1ef commit: 0b3491ede9731d76ac3e373a78d1b83ad84ea584 [3/6] arch/kmap: Remove redundant arch specific kmaps config: xtensa-randconfig-a001-20200501 (attached as .config) compiler: xtensa-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 0b3491ede9731d76ac3e373a78d1b83ad84ea584 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day GCC_VERSION=9.3.0 make.cross ARCH=xtensa If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): In file included from include/linux/pagemap.h:11, from include/linux/mempolicy.h:16, from kernel/fork.c:34: 49 | static inline void *kmap(struct page *page) | ^~~~ In file included from include/linux/highmem.h:46, from include/linux/pagemap.h:11, from include/linux/mempolicy.h:16, from kernel/fork.c:34: arch/xtensa/include/asm/highmem.h:68:21: note: previous definition of 'kmap' was here 68 | static inline void *kmap(struct page *page) | ^~~~ vim +/kmap +49 include/linux/highmem.h 47 48 #ifndef ARCH_HAS_KMAP 50 { 51 return kmap_generic(page); 52 } 53 #endif 54 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org